Home / 12,385.79-18,574.36-5,456.51

Finding the Fourth Proportional to 12,385.79, 18,574.36 and 5,456.51

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Solution

The fourth proportional to 12,385.79, 18,574.36 and 5,456.51 is: 8,182.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.79 : 18,574.36 = 5,456.51 : x
  2. Step 2: Convert to fraction form
    12,385.79/18,574.36 = 5,456.51/x
  3. Step 3: Cross multiply
    12,385.79x = 18,574.36 × 5,456.51
  4. Step 4: Simplify right side
    12,385.79x = 101,351,181.08
  5. Step 5: Solve for x
    x = 101,351,181.08/12,385.79
  6. Step 6: Final answer
    x = 8,182.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.